Import LLVM 3.9.1 including clang and lld.

1 files changed, 16 insertions, 4 deletions

diff --git a/gnu/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp b/gnu/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
index f305e85f6cf..85a3f6f4a8b 100644
--- a/gnu/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
+++ b/gnu/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
@@ -10,6 +10,7 @@
 #include "SystemZTargetMachine.h"
 #include "SystemZTargetTransformInfo.h"
 #include "llvm/CodeGen/Passes.h"
+#include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
@@ -79,13 +80,22 @@ static std::string computeDataLayout(const Triple &TT, StringRef CPU,
   return Ret;
 }
 
+static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
+  // Static code is suitable for use in a dynamic executable; there is no
+  // separate DynamicNoPIC model.
+  if (!RM.hasValue() || *RM == Reloc::DynamicNoPIC)
+    return Reloc::Static;
+  return *RM;
+}
+
 SystemZTargetMachine::SystemZTargetMachine(const Target &T, const Triple &TT,
                                            StringRef CPU, StringRef FS,
                                            const TargetOptions &Options,
-                                           Reloc::Model RM, CodeModel::Model CM,
+                                           Optional<Reloc::Model> RM,
+                                           CodeModel::Model CM,
                                            CodeGenOpt::Level OL)
     : LLVMTargetMachine(T, computeDataLayout(TT, CPU, FS), TT, CPU, FS, Options,
-                        RM, CM, OL),
+                        getEffectiveRelocModel(RM), CM, OL),
       TLOF(make_unique<TargetLoweringObjectFileELF>()),
       Subtarget(TT, CPU, FS, *this) {
   initAsmInfo();
@@ -112,6 +122,9 @@ public:
 } // end anonymous namespace
 
 void SystemZPassConfig::addIRPasses() {
+  if (getOptLevel() != CodeGenOpt::None)
+    addPass(createSystemZTDCPass());
+
   TargetPassConfig::addIRPasses();
 }
 
@@ -125,8 +138,7 @@ bool SystemZPassConfig::addInstSelector() {
 }
 
 void SystemZPassConfig::addPreSched2() {
-  if (getOptLevel() != CodeGenOpt::None &&
-      getSystemZTargetMachine().getSubtargetImpl()->hasLoadStoreOnCond())
+  if (getOptLevel() != CodeGenOpt::None)
     addPass(&IfConverterID);
 }